>> Getting started :


Introduction

The bulb package's setup is very fast. Only 2 steps are required to execute your first cypher's requests.

If you haven't installed the package yet, please see the installation page.


1. Set the bulb settings to your project

A very simple step, just import the set_bulb_settings_on() in the settings.py file of your Django project :

settings.py

from bulb import set_bulb_settings_on



Then, use this method on all the datas contained in your settings.py file. The locals() function returns a dictionary which contains all of these datas. IIIIIIT So just put this at the bottom of your settings.py file :

settings.py

set_bulb_settings_on(locals())



Finally, still in the same file (just below the method we've set previously), configure your Neo4j credentials with theses 3 parameters :
- BULB_DATABASE_URI,
- BULB_DATABASE_ID,
- BULB_DATABASE_PASSWORD.

BULB_DATABASE_URI is the bolt address of your database. Usually on a local server, the bolt address is 'bolt://localhost:7687'. You can find more details in the parameters of your Neo4j database and on the official documentation.

BULB_DATABASE_ID is your Neo4j database id or username. By default the id is defined on 'neo4j'.

BULB_DATABASE_PASSWORD is your Neo4j database password. By default the password is defined on 'neo4j' too. If you haven't changed the password before, you'll be asked to replace the default password with one of your own during the first run on the Neo4j database.

Example :

settings.py

BULB_DATABASE_URI = "bolt://localhost:7687"

BULB_DATABASE_ID = 'neo4j'

BULB_DATABASE_PASSWORD = '1234'


You're project is now configured to work with bulb !



WARNING : don't forget to remove the default admin page at the creation of your project. Indeed, Django's administration is'nt supported by bulb (bulb has its own independent administration). Otherwise, a "LookupError: No installed app with label 'admin'." will be raised.

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    # path('admin/', admin.site.urls),
    path('blog/', include("my_project.urls"))
]



2. Run a first cypher query

bulb can be used in each of your project's file. To do so, in one of these files, import the gdbh object.

views.py

from bulb.db import gdbh



g-db-h means Graph Database Handler and it's an instance of the GraphDatabaseHandler() class. This instance will be used each time you want to interact with the Neo4j database.

Now you can use the w_transaction() method of the gdbh object, to send a query to the database :

gdbh.w_transaction("CREATE (:Person) {first_name: 'Adrien', age: 18}")


The w_transaction() method, means writing transaction, so use it preferably when you want to create or modify datas in the database.
We also find the r_transaction() method that means reading transaction, which should be used preferably to retrieve datas from the database.

For now, if you have any doubt, use the w_transaction() method.